0.29.6

修复

• Responses 流完整性：HTTP 与 WebSocket 请求统一要求明确终态；对账流式正文增量与完成快照，检测缺失、矛盾及乱序内容，避免静默丢失或重复输出。
• SSE 错误与分帧处理：改进 OpenAI 兼容及 Gemini 流对缺失 Content-Type、不同换行格式和上游 JSON 错误响应的处理；流式请求失败或取消时保留已收到的用量，清理异常不覆盖原始错误。
• 服务端错误重试：将可重试的 HTTP 服务端错误范围扩展至 500–599，同时继续排除已识别的永久性配额、余额和账单错误。 #456

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Fixed

• Responses stream integrity: HTTP and WebSocket requests now consistently require an explicit terminal event. Streamed text deltas are reconciled with completion snapshots, and missing, contradictory, or out-of-order content is rejected instead of being silently lost or duplicated.
• SSE errors and framing: Improved handling of missing Content-Type headers, line-ending variants, and upstream JSON error responses in OpenAI-compatible and Gemini streams. Streaming failures and cancellations retain usage received so far, and cleanup errors no longer mask the original failure.
• Server-error retries: Expanded retryable HTTP server errors to the full 500–599 range while continuing to exclude recognized permanent quota, balance, and billing errors. #456